Add cipher_compatibility test case

Author: developernotes

sqlcipher/src/androidTest/java/net/zetetic/database/sqlcipher_cts/CipherCompatibilityTest.java

@@ -0,0 +1,45 @@
+package net.zetetic.database.sqlcipher_cts;
+
+import static org.hamcrest.Matchers.greaterThan;
+import static org.junit.Assert.assertThat;
+
+import android.database.Cursor;
+import android.util.Log;
+
+import net.zetetic.database.sqlcipher.SQLiteConnection;
+import net.zetetic.database.sqlcipher.SQLiteDatabase;
+import net.zetetic.database.sqlcipher.SQLiteDatabaseHook;
+
+import org.junit.Test;
+
+import java.io.File;
+import java.io.IOException;
+
+public class CipherCompatibilityTest extends AndroidSQLCipherTestCase {
+
+  @Test
+  public void shouldOpenSQLCipher3Database() {
+    int count = 0;
+    database.close();
+    File file = null;
+    try {
+      file = extractAssetToDatabaseDirectory("sqlcipher-3.0-testkey.db");
+      database = SQLiteDatabase.openDatabase(file.getAbsolutePath(), "testkey", null, SQLiteDatabase.OPEN_READWRITE, hook);
+      Cursor cursor = database.rawQuery("SELECT COUNT(*) FROM sqlite_master;", null);
+      if(cursor != null && cursor.moveToFirst()){
+        count = cursor.getInt(0);
+        cursor.close();
+      }
+      assertThat(count, greaterThan(0));
+    } finally {
+      delete(file);
+    }
+  }
+
+  SQLiteDatabaseHook hook = new SQLiteDatabaseHook() {
+    public void preKey(SQLiteConnection connection) {}
+    public void postKey(SQLiteConnection connection) {
+      connection.execute("PRAGMA cipher_compatibility = 3;", null, null);
+    }
+  };
+}